如何将对象更改为数组

Question

我有一个需要更改为数组的对象。最好的方法是什么？

var x = {
    vehicle: {
      manufacturer: "Volkswagen",
      carlineName: "Golf",
    }
}

我想要以下结果

var x = {
  vehicle: [
    {
      manufacturer: "Volkswagen",
      carlineName: "Golf",
    }
  ]
}

Answer 1

对于此示例，您可以编写：

var x = {
    vehicle: {
      manufacturer: "Volkswagen",
      carlineName: "Golf",
    }
}

x.vehicle = [x.vehicle]

console.log(x)

x.vehicle得到

{
  manufacturer: "Volkswagen",
  carlineName: "Golf",
}

和方括号 [ x.vehicle ] 将该值放入数组：

[{
  manufacturer: "Volkswagen",
  carlineName: "Golf",
}]

我们想用这个新值重新分配x.vehicle，所以我们使用x.vehicle = [x.vehicle]

Answer 2

您只需构建一个将对象封装在[和]中的新对象，即可使其成为数组。

var x = {
    vehicle: {
      manufacturer: "Volkswagen",
      carlineName: "Golf",
    }
}

var output = {
  vehicle: [x.vehicle] 
};

console.log(output);

这可能比变异现有对象更安全。